X70M钢级14.10+mm板厚管线钢制管前后屈服强度变化规律.pdfVIP

X70M钢级14．10mm板厚管线钢 制管前后屈服强度变化规律 朱春生 (宝山钢铁股份有限公司，上海201900) 摘要：分析了X70M钢级14．10mm板厚管线钢制管前后屈服强度变化规律；利用试验结果及大生产的性 能统计数据，得出通过钢板屈服强度R。，、拉伸曲线形态(金相组织类型)两种预测制管前后屈服强度变化规律的 方法。分析认为：X70M钢级14．10mm板厚管线钢的屈服强度越高，制管后屈服强度下降越多；钢板屈服强度越 低，制管后屈服强度上升越多。 关键词：管线钢管；UOE制管；X70M钢级；屈服强度；变化规律；预防方法 中图分类号：TGll3．25文献标志码：B 文章编号：1001—2311(2017)02—0053—04 Yield Variation of14．10mm Strength Regularity X70SteelPlatebeforeandafter Process Pipe-forming ZHU Chunsheng Ironand 201900，China) (BaoshanSteel Co．，Ltd．，Shanghai inthe isthe variation ofthe14．10mmX70steel essay yieldstrength regularity plate Abstract：Analyzed beforeandafterthe onthe thetestresultandthestatisticdataofthe process．Basedanalysis，and pipe·forming ofthe asobtainedfromthemassive twomethods the asRto．5 usingyieldstrength properties production respectively thetensilecurve structure thesteel are steel type)of plate plate．and morphology(i．e．，themetallographic afterthe to the variation ofthesteel beforeand established pipe。formingprocess．The predictyield regularity plate leadstosuchasconclusionthatthe thel4．10mm X70Msteel is，thelower analysis higher